In practice, I wonder whether this non-text based learning is more useful in the earlier stages of learning to write code. This might because your learning much more than how to write a valid set of lines that compile to an expected result, there's a lot about style, motivation and norms that you have to soak up too. A lot of that is often implicit in text based tutorials, whereas the video based format makes many minor details explicit (e.g. seeing someone type a line of code wrong, and then explain, 'oh yeah this is a commmon mistake'... this actually encodes a lot of information a text based tutorial would typically miss)
